Question

решите пожалуйста срочно!!

Answer 1

Ответ:

Решение на фото ниже

Answer 2

Ответ:

Пошаговое объяснение:

N1

1) 3. 1/4 + 0,25 = 3. 1/4 + 25/100 = 3. 1/4 + 1/4 = 3. 2/4 = 3. 1/2

3) 3. 1/2 - 1. 5/24 = 3. 12/24 - 1. 5/24 = 2. 7/24

3) 2. 3/4 - 4. 1/2 = 2. 3/4 - 4. 2/4 = 2. 3/4 - 3. 6/4 = -1. 3/4

4) -1. 3/4 - 0,75 = -1. 3/4 - 75/100 = -1. 3/4 - 3/4 = -1. 6/4 = -2. 2/4 = -2. 1/2

5) 2. 7/24 : (-2. 1/2) =

55/24 : (-5/2) = 55/24 * (-2/5) = 11/12 * (-1/1) = -11/12

6) -11/12 : (-4. 7/12) =

-11/12 : (-55/12) = -11/12 * (-12/55) = 11/55 = 1/5

Ответ: 1/5 или 0,2

N 2

1) 0,7 : 2. 1/3 = 7/10 : 7/3 = 7/10 * 3/7 = 3/10 = 0,3

2) -2,35 + 0,3 = -2,05

3) -24,6 : (-2,05) = 12

4) 12 - 15,36 = -3,36

Ответ: -3,36

N 3

1) 5. 1/3 * 1,25 = 5. 1/3 * 1. 25/100 = 5. 1/3 * 1. 1/4 = 16/3 * 5/4 = 4/3 * 5/1 = 20/3 = 6. 2/3

2) 5. 5/28 - 6. 2/3 =

5. 15/84 - 6. 56/84 = -1. 41/84

3) -1. 41/84 - 1. 16/21 =

-1. 41/84 - 1. 64/84 = -2. 105/84 = -3. 21/84 = -3. 1/4

4) -3. 1/4 : (-1,5) = -13/4 : (-1. 5/10) = -13/4 : (-15/10) = -13/4 * (-10/15) = -13/2 * (-5/15) = 65/30 = 13/6 = 2. 1/6

Ответ: 2. 1/6

N 4

1) -3. 1/3 * 1,9 = -3. 1/3 * 1. 9/10 = -10/3 * 19/10 = -19/3 = -6. 1/3

2) 19,5 : 4. 1/3 = 19. 5/10 : 4. 1/3 = 195/10 : 13/3 = 195/10 * 3/13 = 15/10 * 3/1 = 45/10 = 9/2 = 4. 1/2

3) -6. 1/3 + 4. 1/2 =

-6. 2/6 + 4. 3/6 = -5. 8/6 + 4. 3/6 = -1. 5/6

4) 0,16 - 62/75 = 16/100 - 62/75 = 4/25 - 62/75 = 12/75 - 62/75 = -50/75 = -2/3

5) -1. 5/6 : (-2/3) = -11/6 * (-3/2) = -11/2 * (-1/2) = 11/4 = 2. 3/4

Ответ: 2. 3/4